Diaphragm pump



I. LONGENECKER A ril 10, 1928.

DIAPHRAGM PUMP F13 Sept. 16, 1926 QZWM/IZW Char/esZLonysnecksr @filifi Fatented Apr. 10, 1928.

CHARLES I. LONGENEGKER, GI" WAUWATOSA, WISCONSIN, ,ASSIGNOBI TO CHAIN BELT COMPANY, OF MILWAUKEE, WISCONSIN, A CORPORATION OF WISCONW 1 DIAPHRAGM: PUMP.

Application filed September 16, 1926. Serial No. 185,819.

This invention relates to diaphragm pumps. p

In diaphragm pumps as heretofore constructed, it has been the usual practice to mount the pump vertically and to provide for the upward travel of the water, with the crank shaft, the gearing, and associated parts located above the diaphragm. This construction has not proven wholly satisfactory as considerable diflicult countered due to the fact that san and foreign matter will lodge between the diaphra and the plunger; and will rapidly cut the diaphragm, andalso due to the tact that in the renewal of the diaphragm it is necessary to remove the gearing, crank shaft, and other mechanism inorder to'reach the diaphragm for repair. Further than this, in the old type of pump, as described above, no eflicient means of lubrication was possible, and the pump, therefore, was subjected to unusual wear. 'l i This "invention is designed to overcome the defects noted above and objects of such invention are to provide a horizontal type of diaphragm pump in whichthe diaphragm maybe easily replaced without disturbing the crank shaft, caring, or associated mechanism, and in w ich there is no chance of the collecting of sand between the plunger and the diaphragm.

Further objects are to provide a novel form of diaphragm pump in which the crank shaft and associated parts are at all times thoroughly oiled by means of a splash lubrieating system, and in which novel means are provided for preventing the entrance of water: into the crank chamber or oil chamber.

is en means of a removable crank case cover 3,

-- so that the crank case forms a'separate oil retaining chamber distinct from the chamher of the pump. It is to be" noted from Figure 1 that the body portion 1 is provided with aninwardly extending tubular portion 4 which constitutes a guide for the plunger 5. This plunger is connected b means of a pitman .6 to the crank 7. Pre

erably, the tubular guide portion a is provided with an enlarged overhangingend 8 which receives a ring-like member 9. This ring-like member comprises a pair of annular cupped washers 10 and 11 which are held in spaced relation by means of the spacer ring 12. This spacer ring, as will be seen particularly from Figure 3, is provided with apertures 13 and with an annular cut-away portion 14 to form an annular chamber outside ofthe ring and below the member 9. Further, it is to be noted that the spacer 12 forms an annular chamber l t-between the plunger 5 and such ring. The purpose of these annular spaces is to provide for the collection of any water that may pass the first cupped washer 11. -A drain pipe 15 communicates with the annular cavity 1t and leads outwardly through the body portion 1 of the pump so as to discharge any collected water and prevent its worklng its way into the crank caseor oil chamber.

The plunger 5 has an enlarged head 16 (see Figures 1 and 3) which has rounded marginal portions, as indicated at 17 This head receives the diaphragm 18 which may be formed of rubber, fabric, or other material. It is held in placeby means ot the diaphragm plate. 19 which is secured by means of the bolts 20 to the head 16. This diaphragm plate or outer plate is provided with outwardly turned marginal portions 21 to prevent cutting of the diaphragm. The diaphragm is held in place against the inwardly and outwardly of air during the all motion of the diaphragm.

The casing 1 or main body portion is provided with a lateral opening closed by means of the plate 25 (see Figure 2).. This plate is provided with an outwardly extending pipe receiving portion 26, and with an inwardly extending continuation or tubular part 27 havin a slanting face. This face cooperates with a flexible valve 28 in the nature of a flap or clap valve. The valve is heldby means of a member 29 bolted to the portion 27 adjacent the upper portion of the valve and is preferably provided with a weight 30 adjacent its lower portion.

The upper part of the casing 1 is provided with a transverse wall 31 which has an opening therethrough closed under normal conditions by means of the valve 32. This valve is provided with a plurality of down wardly extending guiding prongs 33, and with an upwardly extending spindle 34 which loosely fits within an, apertured lug 35 projecting downwardly from the head or top of the outlet or discharge chamber 36.

This discharge chamber is provided with a dischar e portion or pipe receiving'member 37, as s own in Figure 1.

ln operation the oil in the crank case is splashed by the rotating crank and thoroughly lubricates the guide and plunger 5, as well as the crank and pitman. Any water leaking past the first cupped washer ll will discharge through the pipe 15 and pass outwardly from thepump without finding its way into the crank case or oil plunger.

till

chamber. Further, the reciprocation of the plunger causes the diaphragm to bow outwardly and inwardly to thus suck water through the inlet portion 26 and discharge it past the discharge valve 32.

lit is to be particularly noted that the water has a direct passage upwardly through the pump at right angles to the axis of re ciprocation of the plunger. Further, any sand that may find its way into the pump and remain therein will collect in the lowerportion of the casing or body portion 1, and can not lodge between the diaphragm and Further, when it is necessary to renew the diaphragm it is merely necessary to remove the cover plate or casing 22. Thereafter, immediate access to the diaphragm can be had without disturbing the crank or any mechanism associated therewith.

lt will be seen that a novel form of diaphragm pum has been provided by this invention whic may be relied upon for proto be determined as claimed. I claim:

neesgrae longed service, which is equipped for splash lubrication, and in which ready repairs may be. made.

' Although the invention has been described in considerable detail, such description is intended as illustrative rather. than limiting as -the invention may be variously embodied and as the scope of such invention is 1. A diaphragm pump comprising a casing having a fluid receiving chamber provided with opposed walls and having inlet and outlet openings, one of said walls having an enlarged opening, the other of said walls having a tubular guide projecting into said fluid receiving chamber and directed towards said enlarged opening, said casing having a crank compartment oneot whose walls is formed by said last mentioned wall, a plunger slidably mounted within said tubular guide and having an enlarged head provided with a rounded marginal portion, a diaphragm closing said enlarged opening and secured to said enlarged head adjacent said rounded marginal portion, a diaphragm-clamping cap secured to the outer side of said first mentioned wall and clamping the marginal portion of said diaphragm adjacent said enlarged opening, a crank located within said crank compartment, and means connecting said crank and plunger. I 2. A diaphragm pump comprising amain casing having an inwardly extending tubular portion carried by one wall thereof, such 1 tubular portion forming a guide, a plunger mounted for reciprocation within such tubular portion, packing rings carried by said tubular portion and sealing against said plunger, an auxiliary compartment carried by said casing and forming a. crank case adapted to contain lubricant, a crank mounted within said crank case and operatively connected to said plunger, the wall of said casing opposite said first mentioned 11 wall having an enlarged aperture. a cap closing said aperture. a diaphragm clamped between said cap and said casing and connected to said plunger, an inlet portion opening into said casing and provided with l a clap valve, said casing having a horizontal upper wall provided with a discharge aperture. and a valve cooperating with such wall to close said aperture, said last mentioned valve constituting a discharge valve 1 for said pump.

3. A diaphragm pump comprising a body portion having a main compartment and having a crank compartment adapted to contain lubricant, a crank shaft mounted withinsaid crank compartment. a tubular guide projecting into said main compartment, a plunger mounted within said tubular guide and operatively connected to said crank. packing rings carried by the outer end of said tubular guide, a spacer holding said packing rings apart, a discharge pipe leading to thespace between said packing rings and opening outwardly through said body portion, said body portion having an open side, a flexible diaphragm bolted to such open side and closing the opening therein and operatively connected to said plunger,

and an inlet and an outlet valve communieating with said main compartment.

In testimony that I claim the foregoing I have hereunto set my hand at Milwaukee, in the county of Milwaukee and State of Wisconsin.

CHARLES I. LONGENECKER. 

